Motion diverter means for a circuit breaker to facilitate conversion from an undervoltage trip device to a shunt trip device



Nov. 2, 1965 o. NIMYLOWYCZ 3,215,801

MOTION DIVERTER MEANS FOR A CIRCUIT BREAKER TO FAGILITATE CONVERSION FROM AN UNDERVOLTAGE TRIP DEVICE TO A SHUNT TRIP DEVICE Filed Feb. 12, 1963 3 Sheets-Sheet 1 w \N mm R. :v V QQIS f N g W 5 0 i; L: 0 mm g M w SQ Q W M \Q \mQ m \m\ w Y m IL i ll B W NQN w M QQN m\\ \.m\ s

Q -N m l r Nov. 2, 1965 o. NIMYLOWYCZ 3,215,801

MOTION DIVER'I'ER MEANS FOR A CIRCUIT BREAKER T0 FACILITATE CONVERSION FROM AN UNDERVOLTAGE TRIP DEVICE TO A SHUNT TRIP DEVICE 3 Sheets-Sheet 2 Filed Feb. 12, 1963 INVENTOR. do" y, now ya 0W6! N V- 1955 o. NIMYLOWYCZ MOTION DIVERTER MEANS FOR A CIRCUIT BREAKER FACILITATE CONVERSION FROM AN UNDERVOLTAGE TRIP DEVICE TO A SHUNT TRIP DEVICE 3 Sheets-Sheet 3 Filed Feb. 12, 1963 MN WWW INVENTOR. flry/ 47M mm"! United States Patent MOTION DIVERTER MEANS FOR A CIRCUIT BREAKER T0 FACILITATE CONVERSIGN FROM AN UNDERVOLTAGE TRIP DEVICE TO A SHUNT TRIP DEVICE Osyp Nimylowycz, Philadelphia, Pa., assignor to I-T-E Circuit Breaker Company, Philadelphia, Pa., a corporation of Pennsylvania Filed Feb. 12, 1963, Ser. No. 258,067 7 Claims. (Cl. 200109) This invention relates to circuit breakers and more particularly to motion diverter means for use with circuit breaker undervoltage tripping means to readily convert such undervoltage tripping means for use as .a shunt trip device.

Present day circuit breakers are so constructed as to protect electrical circuits from overcurrent and short circuit conditions. Circuit breakers of this general type are normally connected in electrical series with the circuit to be protected and are usually provided with first sensing means of the bimetal actuated type which is responsive to fault current conditions and with second means of the magnetic type which are responsive to severe short circuit conditions. These devices respectively operate so as to isolate the circuit being protected from such overcurrent or short circuit conditions by tripping the circuit breaker cooperating contacts to their fully disengaged position.

In many applications it is desirable to provide additional sensing means which are responsive to either undervoltage or undercurrent conditions in order to trip the circuit breaker upon the occurrence of such conditions.

One such undervoltage device presently in use is comprised of normally energized magnetic means which upon the occurrence of an undervoltage condition becomes deenergized to actuate the circuit breaker tripper bar so as to initiate a tripping operation. The undervoltage sensing means operates a plunger or reciprocating rod positioned between the undervoltage sensing means and the tripper bar so as to rotate the tripper bar by moving the reciprocating rod in a first direction upon deenergization of the undervoltage sensing means.

The deenergization operation causes the undervoltage sensing means armature to become decoupled from the sensing means armature in order to move the reciprocating rod in said first direction.

As Set forth above, it is also desirable to provide sensing means for tripping a circuit breaker responsive to either an undercurrent condition or responsive to some remote control operation. Considering for a moment the undervoltage device described above, it can be seen that deenergization of the undervoltage sensing means causes the reciprocating rod to move in a first direction to actuate the circuit breaker tripper bar. However, in order to trip the circuit breaker by use of the undervoltage sensing means the sensing means is normally deenergized and becomes energized responsive to either the undercurrent or remote trip control causing the armature to be attracted to the sensing means magnetic core. This operation will at best cause the reciprocating rod to move in a second direction opposite said first direction upon energization of the undercurrent or remote control sensing means which is also known by the name shunt trip means. This reverse operation may not be employed to trip the circuit breaker since the trip bar is adapted to initiate the tripping operation through movement of the tripper bar in only one direction thus rendering the undervoltage sensing means incapable for use as a shunt trip means.

The instant invention provides a novel motion diverter means adapted to move the circuit breaker reciprocating rod in the aforementioned first direction upon energization of the shunt trip means and is readily adapted for mounting to the undervoltage sensing means. No modiice fication whatsoever of the undervoltage sensing means is required, thus permitting use of such undervoltage sensing means as a shunt trip means simply by the mounting of the motion diverter means to the undervoltage sensing means.

The device of the instant invention is comprised of a unitary assembly adapted to rotate about a stationary pivot point on the undervoltage sensing means support structure. The undervoltage sensing structure is provided with a suitable aperture for receiving a pin member whose diameter is substantially less than the cooperating aperture provided in the support member. The motion diverter unitary assembly is provided with means for receiving a first end of said pin and with further means positioned to abut said reciprocating rod. With the undervoltage sensing means in the deenergized state no movement is imparted to the reciprocating rod, however, upon energization of the undervoltage sensing means the armature is pulled into engagement with the sensing means core causing the pin means to move the motion diverter in a first direction causing the reciprocating rod or plunger to likewise move in the first direction. This movement actuates the tripper bar to initiate a circuit breaker tripping operation. Thus, the undervoltage sensing means, when coupled with the motion diverter, provides the necessary movement to operate the plunger in said first direction when said sensing means is energized, permitting use of the undervoltage sensing means as a shunt trip means by virtue of the motion diverter attachment.

It is therefore one object of this invention to provide novel motion diverter means for use with undervoltage sensing means to readily convert such undervoltage sensing means for use as a shunt trip assembly.

Another object of the instant invention is to provide novel motion diverter means for use with undervoltage sensing means which is normally deenergized to initiate the trip operation such as to provide a shunt trip operation whereby the sensing means is energized to initiate the tripping operation.

Still another object of the instant invention is to provide novel motion diverter means to convert an undervoltage sensing means for use as a shunt trip means.

Another object of the instant invention is to provide novel motion diverter means for converting undervoltage sensing means for use as a shunt trip means whereby the motion diverter means is adapted to provide the necessary movement for operating the circuit breaker tripper bar enabling the tripping operation to be initiated by energization of the undervoltage sensing means which in the absence of said motion diverter means initiates the tripping operation by deenergization of the undervoltage sensing means.

These and other objects of the invention will become apparent when reading the accompanying description and drawings in which:

FIGURES 1 and 2 are top and side plan views of an undervoltage sensing means.

FIGURES 3 and 4 are side and end views of the undervoltage sensing means of FIGURES 1 and 2 which has been modified to include a motion diverter means designed in accordance with the principles of the instant invention.

FIGURE 5 is a side plan view of an alternative embodiment of the motion diverter means shown in FIG- URES 3 and 4.

Referring now to the drawings; FIGURES 1 and 2 show an undervoltage sensing means 150 applicable for use in a circuit breaker structure. Only fragmentary parts of the circuit breaker structure are shown in FIGURES l and 2 for purposes of clarity, but such a circuit breaker adaptable to receive the undervoltage sensing means is fully set forth in US. Patent 2,928,-

997, entitled 'Co-ordinating Circuit Breaker and Current Limiting Devices, issued Mar. 15, 1960 to W. H. Edmunds and assigned to the assignee of the instant invention. For the purposes of understanding the instant invention, it is sufficient to understand that the circuit breaker 100 is of the molded-case type, adaptable for use in protecting a three-phase system and having first, second and third pairs of cooperating contacts, each being associated with one phase of the three-phase system. While such circuit breakers are adaptable for use in three-phase systems, it should be understood that the device of the instant invention may be used with such circuit breakers for protecting circuits having fewer than, or greater than three-phases.

The fragmented elements of the circuit breaker 100, shown in FIGURES 1 and 2, comprise a circuit breaker interior wall 101 provided within the circuit breaker molded case [not shown] in order to secure the undervoltage sensing means 150 to the circuit breaker, in a manner to be more fully described. A tripper bar 102 rotatable about a pivotally mounted shaft 103 is positioned to the right of interior wall 101. Tripper bar 102 'is coupled by means, not shown, to the circuit breaker latch means [not shown] and upon clockwise rotation 'of tripper bar 102 in the direction shown by arrow 105 the circuit breaker latch means becomes unlatched enabling the circuit breaker opening spring [not shown] to move the circuit breaker movable contact [not shown] out of engagement with its associated stationary contact [not shown] The movable contact is secured to the left-hand end of contact arm'106, only a fragment of which is shown in FIGURE 2. The contact arm 106 is adapted topivot about a suitable shaft 107 and occupies the position 106 when the circuit breaker contacts are in the disengaged posititon and occupies the position shown by phantom lines 108 when the circuit breaker contacts are in the fully engaged position. The movement of contact arm is imparted by the circuit breaker opening spring [not shown] which is suitably coupled by means, not shown, to contact arm 106. A common bar 109 is secured to contact arm 106 by means of U-shaped clamp 110. Common bar 109 couples the contact arm 106 of the middle phase in the circuit breaker 100 to the other two phases of the circuit breaker so that, upon movement of the middle phase contact arm 106 this movement is directly imparted via common bar 109 to the circuit breaker outer phases which are coupled to common bar 109 by U- shaped clamps similar to the clamp 110 as shown in FIG- URE 2.

, The rotation of tripper bar 102 is initiated by a plunger 111 inserted through an opening 112 in circuit breaker interior wall 101 and has its right-hand end abutting a button-shaped projection 104 positioned on the upper end of tripper bar 102. Plunger 111, under control of undervoltage sensing means 150, is adapted to move in the direction shown by arrow 113 upon the occurrence of an undervoltage condition in order to rotate tripper bar 102 in the clockwise direction, thus initiating a tripping operation.

The undervoltage sensing means 150 is comprised of first and second side plates 151 and 152 each having a plurality of suitable apertures 153. Apertures of plates 151 and 152 are aligned so as to receive suitable fastening means for securing a U-shaped laminated magnetic core 154 therebetween. A coil 155 is wound about one arm of U-sha-ped core 154 for generating a magnetic field in core 154 when coil 155 is energized. Coil 155 is provided with a pair of terminals 156 connectible to a source of electrical energy for energization of the coil.

Side plates 151 and 152 are further provided with first and second outwardly extending flanges 157 and 158, respectively, which flanges are aligned substantially in a horizontal direction. The flanges are provided with suita l ap rtures 159 and 160, respectively. A substantially T-shaped, elongated bracket 161 is provided with apertures 162 and 163 for receipt of fastening means 164 and 165, respectively, in order to fasten T-shaped bracket 161 to interior wall 101. First and second tapped apertures, such as tapped apertures 166, are provided in interior wall 101 for receipt of the fastening means, such as, for example, the fastening means 165. Bracket 161 is provided with first and second extending flanges 167 and 168, respectively, which are adapted to be positioned immediately beneath the flanges 157 and 158, respectively, of the sensing means support members 151 and 152. Projections 167 and 168 are provided with openings 169, only one of which is shown in FIGURE 2, in alignment with the openings 159 and so as to receive the fastening members 170 and 171, respectively. This arrangement rigidly fastens the sensing means 150 to the circuit breaker interior wall 101. Side plate 152 is further provided with a flange 173 at its forward end, which flange is adapted to abut against the surface 174 of interior wall 101 to aid in the proper positioning of sensing means 150. Further openings 175 and 176 are provided in side plates 151 and 152, respectively, for the receipt of a shaft 177. The shaft 177 is provided for pivoting the sensing means armature structure 180 in a manner to be more fully described.

The armature structure 180 is comprised of a pair of side plates 181 and 182 provided with suitable openings, such as openings 183 and 184 in side plate 182, for the purpose of mounting a magnetic armature member 186 comprised of a plurality of laminated plates 187. One arm of each L-shaped support member 181 and 182 is provided with a suitable opening for receiving shaft 177 about which the armature structure 180 is adapted to pivot. The forward end portions of L-shaped members 181 and 182 are provided with outwardly extending flanges 188 and 189, respectively. These flanges are adapted to receive a first end 190a and 191a of the spring members 190 and 191, respectively, the opposite ends of which 190k and 191b are secured to flanges 192 and 193 provided at the left-hand ends of support members 151 and 152, respectively.

It can thus be seen that with the sensing means 150 in the deenergized state, spring members 190 and 191, which are under tension, cause the armature member 186 to rotate clockwise about shaft 177 in the direction shown by arrow 194 causing the armature 186 to occupy the position shown by the phantom lines 186'. Conversely, energization of the coil 155 via input terminals 156 energizes magnetic core 154 to attract armature 186' thereby moving the armature to the solid line position 186. The magnetic field is of suflicient strength to overcome the forces exerted upon the armature structure 180 by the spring members 190 and 191.

The armature structure 180 is further provided with an armature side plate assembly 196 having apertures 197 and 198 for receipt of the fastening means 199 and 200, respectively, which are employed for securing the laminated plates 187 to the L-shaped support members 181 and 182. The forward end 202 of armature side plate 196 is flanged in the outward direction and is further constructed to form a U-shaped structure 203 the rearward arm of which constitutes the flange 202 and the forward arm of which 204 abuts the left-hand end of plunger 111.

The operation of the undervoltage sensing means is as follows:

The coil 155 is normally energized thus attracting the armature structure 180 to hold the armature in the solid line position 186 against the forces of spring members 190 and 191, respectively. Upon the occurrence of an undervoltage condition the energy source employed to energize coil 155 becomes isolated therefrom by means not shown thereby causing armature 186 to move to the phantom line .position 186 under control of the spring members 190 and 191. This causes the forward arm 204 of armature side plate 196 to move to the dotted position 207 causing plunger 111 to move in the direction shown by arrow 113. This movement rotates tripper bar 102 clockwise to initiate the circuit breaker tripping operation.

Prior to the initiation of the tripping operation contact arm 106 is in the position shown :by the phantom lines 108. After tripping the contact arm moves to the solid line position 211' to the solid line position 211 thus caus- 110 abuts the lower end 212 of a relatch spring member 211, the upper end of which is secured to flange 189 by fastening means 213. The normal position of relatch spring 211 upon deenergization of the coil means 155 moves under control of armature structure 180 to the phantom line position 211'. This occurs simultaneously with the movement of plunger 111 and tripper bar 102. An instant after this contact arm moves from the closed position 108 to the open position 106 causing the righthand corner of U-shaped clamp 110 to abut relatch spring 211. This drives relatch spring from the phantom line position 211' to the solid line position 211 thus causing the armature structure to move from the dotted line position 186 to the solid line position 186. Relatch spring 211 is provided for the purpose of permitting reclosure of the circuit breaker by enabling armature structure 180 to return to its solid line position in order to permit tripper bar 102 to return to the unactuated position as shown in FIGURES 1 and 2.

Reset of the circuit breaker moves the contact arm from the solid line position 106 to the dotted line position 108 to release relatch spring 211 in order to enable a closing operation to occur if the coil 155 has not again been energized. If coil 155 is energized prior to the closure of the circuit breaker the armature structure will be maintained at its solid line position even though U-shaped bracket 110 moves out of engagement with relatch spring 211. Thus the relatch spring 211 prevents the armature structure from moving the tripper bar 102 to the trip initiating position which would normally prevent the circuit breaker from being reset.

As can be seen from the preceding operating description of the undervoltage sensing means the deenergization of relay coil 155 causes movement of arm 204 in a direction shown by arrow 113 to rotate the tripper bar in the clockwise direction, however, in order to use the undervoltage sensing means 150 as a shunt trip means the normal position of the armature structure 180 becomes the dotted line position 186' and the armature structure is then moved to the solid line position 186 upon energization of coil 155 in order to rotate the tripper bar in the clockwise direction. However, as can be seen from a consideration of FIGURES l and 2, this movement will not drive the plunger 111 in the direction shown by arrow 113.

In order to move plunger 111 in the direction shown by arrow 113 the instant invention provides a motion diverter assembly 300 shown in FIGURES 3 and 4 of the drawings. The undervoltage sensing means is further modified by removing the relatch spring 211 and the armature side plate 196. The motion diverter assembly 300 is then substituted for the armature side plate 196 and is comprised of a substantially =L-shaped structure 301 having a first arm 302. Arm 302 is provided with a first opening 303 which is adapted to receive a pin 320 about which motion diverter 300 rotates. Pin 320 is further seated in suitable openings321 and 322 in side plate members 151 and 152, respectively. Arm 302 is further provided with a slotted opening 304 for receiving pin 330 therethrough. Pin 330 is suitably seated in openings 331 and 332 provided in armature assembly L-shaped brackets 181 and 182, respectively. Side plates 151 and 152 are provided with openings 333 and 334, respectively, through which pin 330 may pass. The diameters of openings 333 and 334 are substantially greater than the diameter of pin 330 for a purpose to be more fully described. Motion diverter assembly 300 is provided with a second arm 305 flanged outward from arm 302 and having a forward end 306 which abuts the left-hand end of plunger 111.

The operation of the undervoltage sensing means as a shunt trip means is as follows:

The normal condition of the sensing means is such that the armature structure 180 has its armature 186 in the solid line position as shown in FIGURE 3. This is due to the fact that coil is deenergized at this time thereby causing springs 190 and 191 to hold the armature structure in the position shown in FIGURE 3. If it is decided to trip the circuit breaker from a remote point or to cause the circuit breaker to automatically trip due to an undercurrent condition, the coil 155 is energized, by means not shown, causing the armature structure to move towards the core structure 154 causing the armature to move to the phantom line position 186'. This causes pin 330 to be driven from the solid line position to the phantom line position 330 shown in FIGURE 3. Pin 330 is permitted to experience such movement due to the oversized diameters of openings 334 and 333 in side plates 152 and 151, respectively. This movement of pin 330 causes the motion diverter assembly to move to the phantom line position 300 thus rotating clockwise about its pivot 303 in the direction shown by arrow 350. This causes the forward end 306 of arm 305 to move to the phantom line position 306' thus driving plunger 111 in the direction shown by arrow 113. The direction of movement of plunger 111 is the same in FIGURE 3 using the motion diverter assembly 300 as the direction of movement of plunger 111 in FIGURE 2 which does not use the motion diverter.

FIGURE 5 shows a modified embodiment 400 which may be substituted for the motion diverter means 300 of FIGURES 3 and 4. Motion diverter assembly 400 is substantially identical to assembly 300 with the exceptiin that the forward end 306 of assembly 300 has been replaced by a tapped aperture 401 and a threaded screw member 402 in order to position the forward end 402a of screw member 402 relative to the left-hand end of plunger 111 to insure successful tripping operation. It should be understood that the forward arm 306 of diverter 300 and forward arm 204 of armature side plate 203 are bendable to provide the necessary adjustment. The armature side plate 191 may likewise be replaced by the alternative embodiment 500 which replaces the U-shaped forward end of side plate 196 by the fastening means of structure 500 which is comprised of a threaded screw member 501 and bolt 502. Thus the forward end 501a of screw member 501 may be positioned relative to the left-hand end of plunger 111 to insure successful tripping operations.

Thus it can be seen that the motion diverter means 300 may be used to convert an undervoltage sensing means normally adapted for use only in the manner shown in FIGURES l and 2, to now be utilized as a shunt trip assembly whereby the reverse operation of the armature structure nevertheless provides the correct movement of plunger 111.

Although there has been described a preferred embodiment of this novel invention, many variations and modifications will now be apparent to those skilled in the art. Therefore, this invention is to be limited, not by the specifiic disclosure herein, but only by the appending claims.

The embodiments of the invention in which an exclusive privilege or property is claimed are defined as follows:

1. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon energization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said L-shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core.

2. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon energization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pins means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said L shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; said movable structure being adapted to rotate in a second direction opposite said first direction upon energization of said magnetic core; said pin means being adapted to rotate said motion diverter means upon rotation of said movable structure in said second direction.

3. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon energization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said .L- shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; the second end of said motion diverter means comprising adjustable means for positioning said diverter means second end relative to said tripper bar to insure successful trip initiating operation.

4. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon energization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said L-shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; a second pivot pin secured to said stationary member, said motion diverting means comprising a first arm having an aperture for receiving one end of said second pivot pin; said arm being slotted to receive one end of said first pin means; said arm having a flanged portion extending substantially perpendicularly from said arm; one end of said flanged portion being adapted to drive said tripper bar in the trip initiating direction.

5. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon encrgization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said L-shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; a second pivot pin secured to said stationary member, said motion diverting means comprising a first arm having an aperture for receiving one end of said second pivot pin; said arm being slotted to receive one end of said first pin means; said arm having a flanged portion extending substantially perpendicularly from said arm; one end of said flanged portion being adapted to drive said tripper bar in the trip initiating direction; said stationary member having a second opening for receiving said first pin means; the diameter of said second opening being substantially greater than the diameter of said first pin means to permit said first pin means to rotate said motion diverter means.

6. A circuit protective sensing device for use in actu ating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magentic core being adapted, upon energization, to rotate said movable structure in a second direction opposite said first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the second end of said motion diverter means located on the side of said axis corresponding to the first legs of said L-shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; a second pivot pin secured to said stationary member, said motion diverting means comprising a first arm having an aperture for receiving one end of said second pivot pin; said arm being slotted to receive one end of said first pin means; said arm having a flanged portion extending substantially perpendicularly from said arm; one end of said flanged portion being adapted to drive said tripper 6 bar in the trip initiating direction; said stationary member having a second opening for receiving said first pin means; the diameter of said second opening being substantially greater than the diameter of said first pin means to permit said first pin means to rotate said motion diverter means; said flanged portion being bendable to position said motion diverter means relative to said tripper bar to insure successful trip initiating operation.

7. A circuit protective sensing device for use in actuating a circuit breaker tripper bar comprising a stationary structure; a movable structure pivotally connected to said stationary structure; said stationary structure including a normally deenergized magnetic core and a coil for energizing said core; said movable structure comprising substantially L-shaped arms and having an armature positioned between a first leg of said arms and above said magnetic core; spring means connected between said stationary structure and the second leg of said L-shaped arms for rotating said movable structure about an axis in a first direction; said magnetic core being adapted, upon energization, to rotate said movable structure in a second direction opposite saidf first direction; rotation of said movable structure in said second direction accompanied by said first legs having a component of movement in a first linear direction; motion diverter means pivotally connected to said stationary structure at a first end thereof; first pin means secured to the second leg of each of said L-shaped arms; said motion diverter means having means for receiving one end of said pin means; the sec- .ond end of said motion diverter means located on the side of said axis corresponding to the first legs of said L- shaped arms, and movable by said pin means in a direction having a component of linear movement opposite to said first linear direction, corresponding to the rotation of said movable structure in said second direction; said second end, when moving in said opposite linear direction engageable with said tripper bar to rotate said tripper bar in the trip initiating direction upon energization of said magnetic core; a second pivot pin secured to said stationary member, said motion diverting means comprising a first arm having an aperture for receiving one end of said second pivot pin; said arm being slotted to receive one end of said first pin means; said arm having a flanged portion extending substantially perpendicularly from said arm; one end of said flanged portion being adapted to drive said tripper bar in the trip initiating direction; said stationary member having a second opening for receiving said first pin means; the diameter of said second opening being substantially greater than the diameter of said first pin means to permit said first pin means to rotate said motion diverter means; said flanged portion comprising an adjustable screw member to position said motion diverter means relative to said tripper bar to insure successful trip initiating operation.

References Cited by the Examiner UNITED STATES PATENTS 2,486,596 11/49 Graves 200l09 3,110,848 11/63 Hobson et a1. 200-109 0 BERNARD A. GILHEANY, Primary Examiner.

ROBERT K. SCHAEFER, Examiner. 

1. A CIRCUIT PROTECTIVE SENSING DEVICE FOR USE IN ACTUATING A CIRCUIT BREAKER TRIPPER BAR COMPRISING A STATIONARY STRUCTURE; A MOVABLE STRUCTURE PIVOTALLY CONNECTED TO SAID STATIONARY STRUCTURE; SAID STATIONARY STRUCTURE INCLUDING A NORMALLY DEENERGIZED MAGNETIC CORE AND A COIL FOR ENERGIZING SAID CORE; SAID MOVABLE STRUCTURE COMPRISING SUBSTANTIALLY L-SHAPED ARMS AND HAVING AN ARMATURE POSITIONED BETWEEN A FIRST LEG OF SAID ARMS AND ABOVE SAID MAGNETIC CORE; SPRING MEANS CONNECTED BETWEEN SAID STATIONARY STRUCTURE AND THE SECOND LEG OF SID L-SHAPED ARMS FOR ROTATING SAID MOVABLE STRUCTURE ABOUT AN AXIS IN A FIRST DIRECTION; SAID MAGNETIC CORE BEING ADAPTED, UPON ENERGIZATION, TO ROTATE SAID MOVABLE STRUCTURE IN A SECOND DIRECTION OPPOSITE SAID FIRST DIRECTION ACCOMPASAID MOVABLE STRUCTURE IN SAID SECOND DIRECTION ACCOMPANIED BY SAID FIRST LEGS HAVING A COMPONENT OF MOVEMENT IN A FIRST LINEAR DIRECTION; MOTION DIVERTER MEANS PIVOTALLY CONNECTED TO SAID STATIONARY STRUCTURE AT A FIRST END THEREOF; FIRST PIN MEANS SECURED TO THE SECOND LEG OF EACH OF SAID L-SHAPED ARMS; SAID MOTION DIVERTER MEANS HAVING MEANS FOR RECEIVING ONE END OF SAID PIN MEANS; THE SECOND END OF SAID MOTION DIVERTER MEANS LOCATED ON THE SIDE OF SAID AXIS CORRESPONDING TO THE FIRST LEGS OF SAID L-SHAPED ARMS, AND MOVABLE BY SAID PIN MEANS IN A DIRECTION HAVING A COMPONENT OF LINEAR MOVEMENT OPPOSITE TO SAID FIRST LINEAR DIRECTION, CORRESPONDING TO THE ROTATION OF SAID MOVABLE STRUCTURE IN SAID SECOND DIRECTION; SAID SECOND END, WHEN MOVIONG IN SAID OPPOSITE LINEAR DIRECTION ENGAGEABLE WITH SAID TRIPPER BAR TO ROTATE SAID TRIPPER BAR IN THE TRIP INITIATING DIRECTION UPON ENERGIZATION OF SAID MAGNETIC CORE. 